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When I click on a drop down, eg tools, the menu flickers and is not readable. Windows 7 environment

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waltonorvin
waltonorvin
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When I click on any item in the menu, the drop down box flickers and is unreadable. Windows 7 environment. I disabled all add-ons with no improvement in performance.

When I click on any item in the menu, the drop down box flickers and is unreadable. Windows 7 environment. I disabled all add-ons with no improvement in performance.

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cor-el
cor-el
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Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

In Firefox 4 and later Safe mode disables extensions and disables hardware acceleration.

  • Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"

If disabling hardware acceleration works then check if there is an update available for your graphics display driver.